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Page last updated on 08-11-2022.


The amount of sediment suspended in the water is termed turbidity and is measured in Nephelometric Turbidity Units (NTU).

Turbidity is caused by particles suspended or dissolved in water that scatter light, making the water appear cloudy or murky.

Increased turbidity can occur through wind and wave action stirring up sediment in shallow areas or through activities such as anchoring, vessel movements, wash and dredging.

Higher levels of turbidity decreases the amount of light that can penetrate through the water to the seabed below, and this mobile sediment can fall on seagrass and corals.

Therefore, lower NTU readings are positive. It is important to note that turbidity can vary significantly from site to site depending on local and regional influences.

Click on/off the site names in the graph to display areas of interest.  
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